Water Drop

The drop is a small volume of liquid is closed.

Droplet take the form of football because of the surface tension, which makes the drop to take a smaller space, the surface area of ​​the ball. The ratio of surface area to the size of the ball is the lowest percentage of objects in general.

Raindrop

When water vapor condenses in the atmosphere consists raindrops. And take the drops form Cree drop of water when you become a diameter of 0.5 millimeters. And range in size water droplets in the rain between 2 to 3 millimeters and weighs about 0.05 grams, and take a spherical shape in the top half of the bottom half of Atafrtah slightly due to friction with the air. The drops of rain accompanied by thunderstorms may reach a diameter of 9 mm and become unstable some of which are divided into small droplets. And take raindrops different sizes can be described as a statistical distribution with a maximum volume. The maximum size varies depending on the abundance of rain.

Raindrop and Rainbow

Drops of water and oil on a wooden surface

Take the steam condensate drops in air spherical shape. When the sun's rays fall on the area filled with drops of water in the air, radiation interference inside the drops and broken twice and graduated in the direction of the viewer of the rainbow. X interference drops degrades white light into its components of the spectrum because of the different refraction of light from red coefficient (broken small angle refraction) to violet (broken big refraction angle), as happens in the publication (or prism glass). And bouncing light into the colors of the spectrum dissolved out of the dense drops Veraha sights on rainbow body. And a circular rainbow arc shape as the reflected light in the direction of the viewer Atkhadd one value of the angle (in the form of repression). It is noted that the position of the sun always be behind the scenes.